Frequently Asked Questions about the ANDO KEIKI S19-07ST Small Precision Hydrometer (1.060 – 1.120, 0.001):

1. What is the ANDO KEIKI S19-07ST hydrometer?

The S19-07ST is a compact glass hydrometer designed for measuring liquid specific gravity in the range of 1.060 to 1.120 with a graduation of 0.001.

Its total length is 160 mm, and it comes with a clear polypropylene protective case for chemical resistance.

2. What measurement range and resolution does it offer?

This model covers specific gravity from 1.060 up to 1.120.

Graduations are marked every 0.001 SG unit, allowing highly precise readings suitable for laboratory and production QC.

3. At what temperature is it calibrated?

Standard calibration is performed at 15 °C (59 °F).

If you work at a different temperature, apply correction tables or use a temperature-controlled bath to maintain accuracy.

4. What materials are used in its construction?

The hydrometer stem and bulb are made of borosilicate glass for chemical durability.

Its protective outer case is made of transparent polypropylene, offering lightweight impact protection and easy cleaning.

5. How does the hydrometer operate?

It relies on Archimedes’ principle: when submerged, buoyant force equals the hydrometer’s weight.

It floats to a depth where this equilibrium occurs, and the liquid surface intersects the scale at the specific gravity value.

6. Which calibration certificates are available?

7. Can I order a 6-point calibration?

Yes.

If you require enhanced accuracy, ANDO KEIKI offers a 6-point JCSS calibration upon request for an additional fee.

8. How do I read the meniscus correctly?

Position your eye level with the liquid surface.

Read the value at the bottom of the curved meniscus where it touches the scale line.

9. What are the basic usage steps?

Pour your sample into a tall, clean cylinder.

Gently lower the hydrometer to avoid trapping air bubbles.

Allow it to settle without vibration.

Read the scale at the meniscus.

Rinse with distilled water or neutral detergent, then dry.

10. How should I clean and store it?

Rinse immediately after use to remove residues.

Use distilled water or mild detergent, dry thoroughly, and store in its polypropylene case away from direct sunlight and extremes of temperature.

11. What applications are typical for this model?

It’s widely used in chemical labs, beverage testing (wine, beer, syrups), cosmetic formulation, detergent QC, and industrial process monitoring.

12. Where can I purchase the S19-07ST and what are typical prices?

13. Are there any shipping or export restrictions?

14. Can I obtain SDS, RoHS or other compliance documents?

Yes.

15. How does the S19-07ST compare with neighboring models?

Each model shares identical precision and construction, differing only in specific gravity range.

16. What precautions should I take when using it?

Avoid dropping or striking the glass stem.

Do not expose the hydrometer to temperatures far outside its calibration range, and handle corrosive chemicals with compatible safety procedures.

17. Is there a warranty and after-sales service?

18. Are spare parts and accessories available?

Replacement protective cases, calibration certificates, and full hydrometer sets can be ordered.